diff --git a/postgres-backup-s3/Dockerfile b/postgres-backup-s3/Dockerfile
index d505a7d..d5eed1c 100644
--- a/postgres-backup-s3/Dockerfile
+++ b/postgres-backup-s3/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.5
+FROM alpine:3.7
 LABEL maintainer="Johannes Schickling <schickling.j@gmail.com>"
 
 ADD install.sh install.sh
diff --git a/postgres-restore-s3/Dockerfile b/postgres-restore-s3/Dockerfile
index b80cf2a..501b66d 100644
--- a/postgres-restore-s3/Dockerfile
+++ b/postgres-restore-s3/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.7
 LABEL maintainer="Johannes Schickling <schickling.j@gmail.com>"
 
 ADD install.sh install.sh